ext_64212 ([identity profile] urbpan.livejournal.com) wrote in [personal profile] urbpan 2011-01-13 10:30 am (UTC)

They are migratory in some parts of their range. The map on this Cornell page shows them as year-round residents of most of North America: http://www.allaboutbirds.org/guide/Great_Blue_Heron/id

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